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a388b75223
Bug: webrtc:8671 Change-Id: I2431b1dd8dbe35fc8742c0640c3b35166e8ef6b7 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171480 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30876}
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_COMFORT_NOISE_GENERATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_COMFORT_NOISE_GENERATOR_H_
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#include <stdint.h>
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#include <array>
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#include <memory>
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "modules/audio_processing/aec3/aec_state.h"
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#include "modules/audio_processing/aec3/fft_data.h"
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#include "rtc_base/constructor_magic.h"
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#include "rtc_base/system/arch.h"
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namespace webrtc {
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namespace aec3 {
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#if defined(WEBRTC_ARCH_X86_FAMILY)
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void EstimateComfortNoise_SSE2(const std::array<float, kFftLengthBy2Plus1>& N2,
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uint32_t* seed,
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FftData* lower_band_noise,
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FftData* upper_band_noise);
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#endif
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void EstimateComfortNoise(const std::array<float, kFftLengthBy2Plus1>& N2,
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uint32_t* seed,
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FftData* lower_band_noise,
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FftData* upper_band_noise);
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} // namespace aec3
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// Generates the comfort noise.
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class ComfortNoiseGenerator {
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public:
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ComfortNoiseGenerator(const EchoCanceller3Config& config,
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Aec3Optimization optimization,
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size_t num_capture_channels);
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ComfortNoiseGenerator() = delete;
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~ComfortNoiseGenerator();
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ComfortNoiseGenerator(const ComfortNoiseGenerator&) = delete;
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// Computes the comfort noise.
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void Compute(bool saturated_capture,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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capture_spectrum,
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rtc::ArrayView<FftData> lower_band_noise,
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rtc::ArrayView<FftData> upper_band_noise);
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// Returns the estimate of the background noise spectrum.
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> NoiseSpectrum()
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const {
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return N2_;
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}
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private:
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const Aec3Optimization optimization_;
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uint32_t seed_;
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const size_t num_capture_channels_;
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const float noise_floor_;
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std::unique_ptr<std::vector<std::array<float, kFftLengthBy2Plus1>>>
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N2_initial_;
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std::vector<std::array<float, kFftLengthBy2Plus1>> Y2_smoothed_;
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std::vector<std::array<float, kFftLengthBy2Plus1>> N2_;
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int N2_counter_ = 0;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_COMFORT_NOISE_GENERATOR_H_
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